Rock Mass Slope Stability Analysis Under Static and Dynamic Conditions in Mumbai, India

Abstract

The rock slope stability has gained much importance in the recent years owing to the development of infrastructure in/on rock slopes areas in the form of high-rise building, roads, railways, dams, and other rock engineering projects. Rock slope stability is generally affected by the property of rock material along with the discontinuities in the rock mass. It is also dependent on slope angle, slope height, surcharge, groundwater conditions, rainfall, and dynamic forces like earthquake. If these factors, coupled with deep weathering of the rock mass, complicate the entire behavior of the rock slope and makes the analysis of rock slopes challenging task. For the present work, fieldwork was carried out for joint mapping on differentially weathered volcanic rock of selected slope sections at Mumbai in Deccan trap regions. Block and core samples were collected from each category of the rocks and their respective geotechnical properties measured experimentally and presented her in. The rock slope stability analysis was done using numerical modeling techniques, finite element method (FEM)-based two-dimensional analyses (RS2), or Phase2 9.0 software from Rocscience. The rock slope having four different quality of rock mass was analyzed under static and pseudo-static conditions. Finally, the optimum support measures were provided to the slope for stabilizing it and the corresponding analysis was also done.